A corked flask containing boiling water and its vapour is allowed
A corked flask containing boiling water and its vapour is allowed to cool down to room temperature. If water and its vapour as a whole is the system then
Options
(a) ΔS > 0 […]
Thermodynamics
The equation ΔG = ΔH – TΔS is for
The equation ΔG = ΔH – TΔS is for
Options
(a) open system (b) closed system (c) isolated system (d) all the above
Correct Answer:
all the above
Explanation:
No explanation available. Be the […]
Consider the modes of transformations of a gas from state ‘A’ to state ‘B’
Consider the modes of transformations of a gas from state ‘A’ to state ‘B’ as Which one of the following is true
Options
(a) ΔH = q along A → C (b) ΔS is […]
Which of the following depends on the path followed
Which of the following depends on the path followed
Options
(a) internal energy change (b) enthalpy change (c) work done (d) free energy change
Correct Answer:
work done
Explanation:
Internal energy, enthalpy and free […]
The work done in expansion of an ideal gas from an initial volume v1 to a final v2
The work done in expansion of an ideal gas from an initial volume v1 to a final v2 litres against a pressure of 1atm at 300 K is
Options
(a) 2.303 R ˣ 300 […]
For spontaneous reaction
For spontaneous reaction
Options
(a) ΔE or ΔU must decrease (b) ΔH must decrease (c) ΔS must decrease (d) ΔG must decrease
Correct Answer:
ΔG must decrease
Explanation:
For spontaneous reaction, ΔG = -ve, […]
For isothermal change in the case of an ideal gas
For isothermal change in the case of an ideal gas
Options
(a) ΔG = ΔH – TΔS (b) ΔG = – TΔS (c) ΔA = ΔE – TΔS (d) none of the above
Correct […]
Standard enthalpy of vaporisation Δvap H⁰ for water at 100⁰C is 40.66 kJ mol⁻¹.
Standard enthalpy of vaporisation Δvap H⁰ for water at 100⁰C is 40.66 kJ mol⁻¹. The internal energy of vaporisation of water at 100⁰C (in kJ mol⁻¹) is
Options
(a) 37.56 (b) -43.76 (c) 43.76 […]
The enthalpy of fusion of water is 1.435 kcal/mol.The molar entropy
The enthalpy of fusion of water is 1.435 kcal/mol.The molar entropy change for the melting of ice at 0⁰C is
Options
(a) 10.52 cal/(mol-K) (b) 21.01 cal/(mol-K) (c) 5.260 cal/(mol-K) (d) 0.526 cal/(mol-K)
Correct […]
In which of the following reaction standard entropy change (ΔS⁰)
In which of the following reaction standard entropy change (ΔS⁰) is positive and standard Gibb’s energy change (ΔG⁰) decreases sharply with increasing temperature
Options
(a) C (graphite) + 1/2 O₂(g) → CO(g) (b) CO(g) […]